"Thai piranthaal Vazhi pirakkum", yes this is a phrase
commonly used by Tamils since the Sangam Period (2,000 year back). Why
not "Chithirai piranthall vazhi pirakkum", if Chithirai is the
New Year of the Tamil people.
Thai Pongal is the New Year for the Tamil speaking people. Allow me to
send my sincere and best wishes to one and all Tamils. I also wish them
a very Happy and Prosperous Tamil New Year and Joyous Pongal.